<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>叠加</title>
	<style>
		a{
			color: red;
		}
		
		.title{
			color: green;
		}
		.link{
			color: blue !important;
		}
		#link{
			color: green;
		}
		/*a.link{
			color: yellow;
		}*/
	</style>
</head>
<body>
	<a class="link title" id="link"  href="">我是一个p</a>
</body>
</html>